The fracture at the tailbone may be caused by local skin lesions, local skin may be dry, after a long period of friction caused by local skin sclerosis, in the case of external force will easily lead to local skin cracking. In addition, dermatosclerosis can also cause a decrease in the elasticity of the skin, which can lead to localized skin cracking when subjected to external forces. Special diseases such as localized sores or herpes can also affect the local skin and may cause localized skin tissue to crack. There are also special diseases such as connective tissue disease of the sacrococcygeal region, which may lead to localized skin cracking due to poor skin elasticity, and fungal infection of the sacrococcygeal region may also lead to skin cracking.